Hi I was first scanned and found to have bilateral L4L5 pars defects and slippage about 13 years ago, and despite exercising & physio ec it has gradually become worse ( the standard thing, left leg pain now always, I constantly lean forward without even noticing now as standing up straight is too painful etc) So I am on a waiting list to have fusion and laminectomy, but it could be another 6 -9 months. For the last month though I have been having increasing episodes where both legs become so weak and lose so much sensation I can't stand. It passes after about 15 minutes or so. It also seems my calf muscles are starting to waste a bit as well and they constantly ache. For me to see my specialist its a 250 km trip, but should I do it or just accept its a general worsening, and ignoring it won't do any real damage. I find the weakness and strange sensations scarier than the pain. Has anyone experienced similar or have a view?